Intelligent vehicle management system based on active and semi-active RFID technology
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1. The basis of the scheme design
1) “Interim Provisions on the Design and Management of Intelligent Building Systems Engineering” Ministry of Construction 1997
2) “Code for Electrical Design of Civil Buildings” (JGJ/T16-92) Ministry of Construction
3) “Intelligent Building Design Standard” (DBJ08－4－95) Shanghai Construction Committee 1996
4) “Code for Design of Integrated Wiring Engineering for Buildings and Building Groups” China Engineering Construction Standards Association 1997
5) “Code for Construction and Acceptance of Integrated Wiring Projects for Buildings and Building Groups” China Engineering Construction Standards Association 1997
6) “Building Communication Integrated Wiring System” (UD/T926) Ministry of Posts and Telecommunications 1997
7) “Code for Design of Automatic Fire Alarm System” State Planning Commission 1988
2. General Principles of System Design Scheme
1.System function overview
1) Admission control function
Identity recognition: When the vehicle enters the range of the long-distance reader card reader, the reader automatically recognizes the relevant information of the vehicle and transmits the relevant information to the background terminal. After comparing with the legal vehicle, the barrier will be automatically opened, and the unauthorized card will not enter the venue and alarm Notify the security and prepare to deal with relevant incidents in a timely manner;
Information record: When reading the card, it will automatically record the time of entry, the place of entry, vehicle information, the identity of the owner, etc.;
Image capture: capture the image of the entering vehicle synchronously with the gate opening instruction and store it in the database for vehicle verification when leaving the venue and later reference;
2) Exit control function
Automatic identification: The vehicle enters the range of the long-distance reader card reader, the reader automatically reads the relevant information in the tag card on the car and transmits the information to the background terminal. After the comparison, the legal vehicle automatically opens the barriers. Be on the scene and call the police to warn the security to pay attention to interrogation, so as to avoid losing the car;
Image comparison: Take the image of the exiting vehicle and store it, and at the same time automatically call up the comparison display of the entry image of the vehicle to perform accurate comparison confirmation, enhance the anti-theft function, and make the post-audit more accurate and easier;
License plate recognition: automatically extract the license plate number of the exiting vehicle, store it as a unique identification mark of the vehicle, and automatically compare it with the license plate number recorded when entering the venue, so as to automatically and quickly confirm whether the entry and exit are the same car, and Can be viewed later;
3) Central control and management functions
IC and ID card management: realize the authorized issuance of IC and ID cards, data modification, loss reporting/unreporting, card return, emptying and recycling, etc. The maximum number of lost reporting cards that the system can handle is 10,000 (that is, the number of blacklists is 1 Ten thousand);
Universal query function: It can query related data such as vehicle usage, card usage, and vehicle entry and exit through one condition or a combination of one and multiple conditions, and can generate detailed reports in accordance with the requirements of managers;
Equipment monitoring and management: control the opening, closing and stopping of the barrier, real-time detection of the working status of the barrier, real-time detection of the working status of the vehicle detector and whether there is a vehicle on the induction coil;
System settings: With a simple mouse click, you can easily configure the system settings, such as with/without image comparison system, data retention time, and other related content;
2.Design goals and principles
1) Goal
Safety function of vehicle storage;
Economical and reasonable operating costs;
Convenient and fast way of passing, better service to owners;
Improve the grade of the community;
2) Principle
Advanced and mature technology and equipment ensure the safe, reliable and stable operation of the system;
A complete management system can prevent the loss of vehicles to the greatest extent and provide better convenience for owners;
Reasonable layout, improve the service quality of the system, shorten the service time, and increase the efficiency of vehicle traffic;
Principles of practicability, real-time and completeness;
Principles of scalability and ease of maintenance;
3) Management system
The general idea of the management system is that the scene is unattended and fully intelligent. Managers can exercise complete control over the parking lot at any fixed location outside the parking lot environment, complete various statistics, monitoring, alarms, guidance and other functions, which greatly reduces management. The amount of labor of the personnel, and can provide a brand-new modern atmosphere for the owner.
3. System composition and design
1) System topology
The intelligent parking lot management system can adopt various network topologies. The server and the management workstation are connected in the form of a local area network (LAN), and the computer is connected to the lower computer by RS485 bus; it is simple, quick to put into use, and the system is stable. The highest rate of return on investment. The block diagram of its topology is as follows:
2) Network topology diagram
For the entrance and exit control system, the server is responsible for the important task of the entire system. The rapid access of data is a problem worthy of concern, but the safety of the data cannot be ignored. Once the hard disk fails or the data is lost or damaged due to improper operation, it will The entire system enterprise will have a huge impact on the system. It can be seen that the value of the data stored by the server far exceeds the value of the machine itself, and the SQL server selection cannot be ignored. The vehicle management system with the entrances and exits together only needs a computer to manage it. If the entrances and exits are separated and there are many temporary vehicles, it is best to place a computer at each entrance and have a security guard on duty. In order to deal with emergencies.
The first level network is distributed by RS485 bus system, which mainly provides communication for each entrance and exit control machine, and the card reading data is taken; the second level network is LAN Ethernet star connection, computer and computer communication and data storage, SQL server is responsible for Data query and processing, distribution of network resources, and classification review of the authority of each workstation.
3) System workflow
Schematic diagram of approach
instruction:
Legal vehicle card holder
When the vehicle presses the ground-sensing coil, the reader will automatically sense the tag card on the vehicle and compare it with the vehicle information and photos stored in the computer, and automatically open the barriers after verification; the computer in the duty room automatically checks and records the time of entry and exit of the vehicle, and Display the license plate;
The driver drove into the community, and when the vehicle hits the ground, the barriers are automatically closed;
Temporary Parker
The external vehicle is pressed to the ground, the card reader is working but no legal vehicle card is detected, the alarm will give an alarm, and the duty officer can take measures to show the specific situation, and can manually control the barrier or issue a temporary vehicle card for incident processing;
The driver drove into the community and pressed the geo-sensing barrier to close it manually or automatically;
Schematic diagram of appearance
instruction:
Legal vehicle card holder
When the vehicle presses the ground-sensing coil, the reader will automatically sense the tag card on the vehicle and compare it with the vehicle information and photos stored in the computer, and automatically open the barriers after verification; the computer in the duty room automatically checks and records the time of entry and exit of the vehicle, and Display the license plate;
The driver drove out of the community. After leaving the field, the vehicle fell into the ground and the barriers were automatically closed;
Temporary Parker
Give the card to the attendant on duty;
The barriers are opened and vehicles leave the scene;
4) One-in-one-out parking system diagram
4. Introduction to the main equipment of the system
1) RS485 communication card
The main technical parameters:
1. Provide RS-485 communication interface;
2. The device exchanges data with the computer through the 485 communication card, working in half-duplex;
3. Power required: DC 12V;
4. Maximum communication distance: 1.2Km;
2) Chinese display
Main structural features:
2. Highlight LED dot matrix; (Chinese display screen)
3. The circuit includes a microcontroller, drive display scanning, communication interface, real-time clock, font library, etc.;
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